An object of the present invention is to provide a method for efficiently obtaining fluoroethyelene. A method for producing HFO-1132(Z/E) comprising reacting a halogenated ethylene represented by formula (1): CHX.sup.1═CHX.sup.2 (1), wherein X.sup.1 and X.sup.2 are identical or different, and each represents chlorine, bromine, or iodine, with a metal fluoride. A method for producing HFO-1123, comprising reacting a halogenated ethylene represented by formula (2): CX.sup.3X.sup.4═CHX.sup.5 (2), wherein X.sup.3, X.sup.4, and X.sup.5 are identical or different, and each represents chlorine, bromine, or iodine, with a metal fluoride.

An object of the present invention is to provide a method for efficiently obtaining fluoroethyelene. A method for producing HFO-1132(Z/E) comprising reacting a halogenated ethylene represented by formula (1): CHX.sup.1═CHX.sup.2 (1), wherein X.sup.1 and X.sup.2 are identical or different, and each represents chlorine, bromine, or iodine, with a metal fluoride. A method for producing HFO-1123, comprising reacting a halogenated ethylene represented by formula (2): CX.sup.3X.sup.4═CHX.sup.5 (2), wherein X.sup.3, X.sup.4, and X.sup.5 are identical or different, and each represents chlorine, bromine, or iodine, with a metal fluoride.

Described herein is method of making a halogenated partially fluorinated compound, comprising: (a) providing a compound having the following structure of formula (I): R.sub.f—CF═CXY wherein X and Y are independently selected from F and Cl; wherein R.sub.f is a fluorinated monovalent group comprising 1 to 10 carbon atoms; (b) contacting the compound with at least one of (i) an iodine or bromine containing salt in the presence of an acid; and (ii) aqueous solution of HZ wherein Z is selected from I and Br to form the halogenated partially fluorinated compound of the formula (II): R′.sub.f—CFH—CXYZ wherein X and Y are independently selected from F and Cl; Z is selected from I and Br; and R′.sub.f is a fluorinated monovalent group comprising 1 to 10 carbon atoms.

A process for preparing a fluorinating reagent from a calcium-containing compound is disclosed. The process bypasses the requirement to form hydrofluoric acid. The fluorinating reagent can be used to prepare high-value fluorochemicals.

Provided is a method of manufacturing octafluorocyclopentene by bringing 1-chloroheptafluorocyclopentene into contact with an alkali metal fluoride. The manufacturing method includes a feedstock heating step of heating 1-chloroheptafluorocyclopentene to not lower than 40 C. and not higher than 55 C. and a fluorination step of maintaining a suspension containing a polar aprotic solvent and an alkali metal fluoride at 85 C. or higher while supplying heated 1-chloroheptafluorocyclopentene into the suspension and performing fluorination thereof to obtain octafluorocyclopentene.

Provided is a method of manufacturing octafluorocyclopentene by bringing 1-chloroheptafluorocyclopentene into contact with an alkali metal fluoride. The manufacturing method includes a feedstock heating step of heating 1-chloroheptafluorocyclopentene to not lower than 40 C. and not higher than 55 C. and a fluorination step of maintaining a suspension containing a polar aprotic solvent and an alkali metal fluoride at 85 C. or higher while supplying heated 1-chloroheptafluorocyclopentene into the suspension and performing fluorination thereof to obtain octafluorocyclopentene.

Provided is a manufacturing method in which 1-chloroheptafluorocyclopentene is brought into contact with an alkali metal fluoride to obtain octafluorocyclopentene. The manufacturing method includes a fluorination step of maintaining, at 85 C. or higher, a suspension containing an alkali metal fluoride suspended in a mixed solvent including a polar aprotic solvent and a glycol ether having a higher boiling point than the polar aprotic solvent while supplying 1-chloroheptafluoropentene into the suspension and performing fluorination thereof to obtain octafluorocyclopentene.

Provided is a manufacturing method in which 1-chloroheptafluorocyclopentene is brought into contact with an alkali metal fluoride to obtain octafluorocyclopentene. The manufacturing method includes a fluorination step of maintaining, at 85 C. or higher, a suspension containing an alkali metal fluoride suspended in a mixed solvent including a polar aprotic solvent and a glycol ether having a higher boiling point than the polar aprotic solvent while supplying 1-chloroheptafluoropentene into the suspension and performing fluorination thereof to obtain octafluorocyclopentene.

A manufacturing method of 1-chloro-3,3,3-trifluoropropene (1233zd) is provided. This manufacturing method includes a reaction in which a halogenated hydrocarbon compound having a carbon number of 3 and represented by a general formula (1) is heated:
CF.sub.aCl.sub.3-aCH.sub.2CHF.sub.bCl.sub.2-b(1) In the formula, a is an integer from 0 to 2, b is 1 or 2 when a=0, b is 0 or 1 when a=1, and b is 0 when a=2.

Provided is a method of manufacturing octafluorocyclopentene by bringing 1-chloroheptafluorocyclopentene into contact with an alkali metal fluoride. The manufacturing method includes a feedstock heating step of heating 1-chloroheptafluorocyclopentene to not lower than 40 C. and not higher than 55 C. and a fluorination step of maintaining a suspension containing a polar aprotic solvent and an alkali metal fluoride at 85 C. or higher while supplying heated 1-chloroheptafluorocyclopentene into the suspension and performing fluorination thereof to obtain octafluorocyclopentene.